How to configure Oracle traffic director for full site failover to have high availability?

I have two server system, each server having both apache tomcat server(deployed web app) and oracle 11g database server. The database on the two server is synchronised by oracle data gaurd for high availibility. tomcat Web servers is running individually on each server system with no load balancing. One server acts as primary server and other server acts as redundant server.

Usually for any failure on primary server, I have to manually change the IP/Domain name to access the other server.

I have came across Oracle Traffic director which may solve my isssue to switch any client request to redundant server in case of failure of primary server. Since I am new to oracle traffic director, can any one guide me to configure otd for full site failover?